Swine - one bold in action amid conflict (4,4)
I believe the answer is:
wild boar
'swine' is the definition.
(wild boar is a kind of swine)
'one bold in action amid conflict' is the wordplay.
'one' becomes 'i' (Roman numeral).
'in action' is an anagram indicator (I've seen this in other clues).
'amid' means one lot of letters goes inside another.
'conflict' becomes 'war' (war is a kind of conflict).
'i'+'bold'='ibold'
'ibold' anagrammed gives 'ildbo'.
'ildbo' going inside 'war' is 'WILD BOAR'.
(Other definitions for wild boar that I've seen before include "Feral pig" , "strong meat" , "Game" , "Non-domesticated pig" , "Untamed pig" .)